The CSS (Central Superior Services) exam in Pakistan is not conducted after intermediate (12th grade) education. It is a competitive examination for recruitment to various positions in the country's civil services. The CSS exam is open to individuals who have completed their bachelor's degree (16 years of education) from a recognized university or institution.
To be eligible for the CSS exam, candidates must have a minimum of a bachelor's degree in any discipline. The degree can be in fields like arts, sciences, engineering, medicine, social sciences, etc. After completing a bachelor's degree, candidates can apply for the CSS exam through the Federal Public Service Commission (FPSC) of Pakistan.
If you are currently in intermediate (12th grade), you will need to complete your bachelor's degree first to become eligible to apply for the CSS exam in the future. It's essential to plan your education and preparation for the CSS exam accordingly to increase your chances of success.